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xenolith

[zen-l-ith] /ˈzɛn l ɪθ/
noun, Petrography.
1.
a rock fragment foreign to the igneous rock in which it is embedded.
Also called inclusion.
Origin of xenolith
1900-1905
First recorded in 1900-05; xeno- + -lith
Related forms
xenolithic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for xenolith

xenolith

/ˈzɛnəlɪθ/
noun
1.
a fragment of rock differing in origin, composition, structure, etc, from the igneous rock enclosing it
Derived Forms
xenolithic, adjective
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for xenolith
n.

1894, from xeno- "foreign, strange" + -lith "stone."

Online Etymology Dictionary, © 2010 Douglas Harper
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xenolith in Science
xenolith
  (zěn'ə-lĭth', zē'nə-)   
A rock fragment foreign to the igneous mass in which it occurs. Xenoliths usually become incorporated into a cooling magma body when pieces of the rock into which the magma was injected break off and fall into it. Compare xenocryst.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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